This page denotes the description of each map type that is adjustable by the end-user within the TCU config app.
The upshift maps denotes the minimum input speed for each up-shift gear change, depending on pedal value.
Increasing values here will result in later upshifts, and decreasing will result in earlier upshifts
The downshift maps denotes the minimum input speed for each down-shift gear change, depending on pedal value.
Increasing values here will result in the TCU downshifting at higher speeds, and decreasing values will result in the TCU downshifting at lower speeds.
It is recommended to keep the 2-1 downshift with no pedal input speed very low (100RPM), so the TCU only downshifts when almost stopped when coming to a stop
All maps in this category perform the same function. The TCU uses the values here to try and adjust target shifting speed. Higher values here result in longer smoother shifting, and lower values will result in faster snappier shifts
This feature will be deprecated or modified in future releases, as the TCU now uses these values as a rough idea of shift harshness, and does not try to achieve the inputted shift speed.
These maps denote the filling behaviour of the TCU for each change. They are categoried based on clutch pack name for applying shift. Therefore, it is important to know the following table for which clutch is applied for which gear change:
| Gear change | Applying clutch |
| 1->2 | K1 |
| 2->3 | K2 |
| 3->4 | K3 |
| 4->5 | B1 |
| 2->1 | B1 |
| 3->2 | K3 |
| 4->3 | B2* |
| 5->4 | K1 |
| P/N->R | B3 |
This map denotes the high filling pressure for stage 1 of the clutch filling process. The aim of this filling phase is to remove clearances in the clutch pack.
Higher values will increase filling pressure, which if increased too much, will result in the clutch biting too early, which can lead to a harsh feeling shift. If the value is decreased too much, then the applying clutch will not be ready for application when the TCU releases the old clutch, resulting in a flare (RPM rise).
If you plan to modify this map, tune in conjunction with filling time (See below)
This map denotes the time to stay at high filling pressure, before the TCU starts the low filling process. This map has values that are higher at lower temperatures (Since the ATF is thicker, it takes longer to fill the clutch packs).
Increasing time may result in more direct feeling shifts, at the expense of longer shift delay. Decreasing values here may result in faster shifts, but if decreased too much may result in a flare.
This map denotes the pressure for low filling (Clutch pack hold). This is mainly used for the release-shift algorithm. In this phase, the TCU starts to let go of the old clutch pack, and the purpose of this pressure is to hold the new clutch in a state where it is ready to be applied, but not applying it. Once the off clutch has been released, the new clutch is ramped on from this maps pressure value.
Increasing values here may result in a faster shift, but also might result in harsher shift, since the on clutch starts to apply too early or with too much force.
Decreasing values here may result in smoother shifting, since the clutch is applied more gradually, with the downside of longer shifting time.
These maps may automatically change over time as the TCU is self-adapting these values constantly
These maps denotes the pressure required to achieve either slipping or locking of the torque converter, based on gearbox load. Gearbox load is calculated like so:
Torque_Input / Torque_Rated
Input torque can be negative (Pulling vs Pushing), and the rated torque comes from the the gearbox type (EG W5A330 = 330Nm, W5A580 = 580Nm).
The maximum value for any cell here is 15000 mBar. Any value higher is discarded and capped at 15000.
Increasing values here will result in less torque converter slip, and decreasing them will result in more converter slip. You should adjust these values in 500mBar steps until you notice the converter slip decreasing.
If you have the TCC Zener board installed on your TCU, you should raise the pressures to at least 3000mBar
This 3D map denotes the target slip the converter should be targeting depending on load and RPM. The TCU uses this map for adaptation.
10/12/25 FW and newer
The TCU clamps the minimum slip to 10RPM. Any values less, will be internally set to 10RPM by the TCU. This is so the TCU can monitor for over-locking in the closed state.
ADVANCED USERS ONLY!! DO NOT MODIFY THIS MAP UNLESS YOU ABSOLUTELY KNOW WHAT YOU ARE DOING
This map adjusts the mapping between the TCC solenoid PWM and output pressure of the command valve in the valve body, which is slightly different depending on temperature of the ATF fluid.